<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <!--购物项列表-->
        <ul class="cart-list" v-for="(cartItem, index) in cartItems" :key="cartItem.skuId">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :checked="cartItem.check"
                   @change="updateChecked(cartItem, $event)">
          </li>
          <li class="cart-list-con2">
            <img :src="cartItem.image">
            <div class="item-msg">{{ cartItem.title }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cartItem.price }}.00</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="changeBuyNum('minus', -1, cartItem)">-</a>
            <input autocomplete="off" type="text" minnum="1" class="itxt" :value="cartItem.count"
                   @change="changeBuyNum('text', $event.target.value * 1, cartItem)">
            <a href="javascript:void(0)" class="plus" @click="changeBuyNum('plus', 1, cartItem)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cartItem.totalPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a class="sindelet" @click="deleteCartById(cartItem)">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <!--购物车工具栏-->
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" :checked="isAllChecked" @change="updateAllCartChecked">
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none" @click="deleteAllCheckedCart">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>0</span>件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ cart.totalAmount }}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {mapGetters, mapState} from 'vuex';
import throttle from "lodash/throttle"

export default {
  name: 'ShopCart',
  mounted() {
    this.getShopCartData()
  },
  methods: {
    //获取购物车数据
    getShopCartData() {
      this.$store.dispatch("getCartList")
    },
    //改变商品购买数量
    async changeBuyNum(type, disNum, cartItem) {
      //传递给服务器的是变化的量，1，-1
      switch (type) {
        case "plus":
          disNum = 1
          break
        case "minus":
          disNum = cartItem.count > 1 ? -1 : 0
          break
        case "text":
          //非法的，带有汉字
          if (isNaN(disNum) || disNum < 1) {
            disNum = 0
          } else {
            disNum = parseInt(disNum) - cartItem.count
          }
          break
      }
      try {
        await this.$store.dispatch("changeCartNum", {skuId: cartItem.skuId, num: cartItem.count + disNum})
        //再次获取购物车数据
        this.getShopCartData()
      } catch (e) {
      }
    },
    //删除某一个购物项的操作
    async deleteCartById(cartItem) {
      try {
        await this.$store.dispatch("deleteCartListBySkuId", cartItem.skuId)
        this.getShopCartData()
      } catch (error) {
        alert(error.message)
      }
    },
    //修改商品的勾选状态
    async updateChecked(cartItem, event) {
      try {
        let isChecked = event.target.checked ? "1" : "0"
        await this.$store.dispatch("updateCheckedById", {skuId: cartItem.skuId, isChecked})
        this.getShopCartData()
      } catch (error) {
        alert(error.message)
      }
    },
    //删除全部选中的商品
    async deleteAllCheckedCart() {
      try {
        await this.$store.dispatch("deleteAllCheckedCart")
        this.getShopCartData()
      } catch (error) {
        alert(error.message)
      }
    },
    //修改全部商品的选中状态
    async updateAllCartChecked(event) {
      try {
        let isChecked = event.target.checked ? "1" : "0"
        await this.$store.dispatch("updateAllCartIsChecked", isChecked)
        this.getShopCartData()
      } catch (error) {
        alert(error.message)
      }
    }
  },
  computed: {
    ...mapState({
      cart: state => state.shopcart.cart
    }),
    //购物车数据
    cartItems() {
      return this.cart.items || []
    },
    //判断是否全选
    isAllChecked() {
      return this.cartItems.length > 0 && this.cartItems.every(cartItem => cartItem.check === true)
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;

      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }


        .cart-list-con4 {
          width: 10%;

        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }

          .sindelet {
            cursor: pointer;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
